JP2015231571A - 塞栓除去装置および急性虚血性脳卒中症状の治療方法 - Google Patents
塞栓除去装置および急性虚血性脳卒中症状の治療方法 Download PDFInfo
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Abstract
【解決手段】本装置は、サイズが分散している有効孔を備えた3次元濾過マトリックスを形成することができる。繊維の束の設計により、装置を、迂回する大脳動脈内に有効に送達して脳卒中をもたらす血塊を除去することができる。繊維束ベースの濾過マトリックスは、血塊除去プロセス中に血管の変化する内周に沿うという利点と、したがって、血塊を血管内に有効に保持し除去する能力とを提供する。濾過マトリックスは、除去プロセス中に血塊のあらゆる破断部を捕捉するさらなる利点を提供する。複数の繊維束を結合して、有効な血塊係合要素を形成することができる。補助的係合構造を、機械的治療機構と同様に、脳卒中治療装置に組み込むことができる。繊維ベースの要素の配置を、作動器具によって容易にすることができる。血塊除去プロセス中に吸引を採用することができる。
【選択図】図11
Description
本出願は、参照により本明細書に組み込まれる、「Embolectomy devices and methods for treatment of acute ischemic stroke condition」と題する、Jason Galdonikらによる、2010年4月13日に出願された米国仮特許出願第61/323,461号明細書に対する優先権を主張する。
塞栓除去装置は、概して、可撓性ワイヤと、可撓性ワイヤと係合する繊維ベースの血塊係合構造または要素とを備えている。繊維ベースの要素は、概して、非自己拡張型構造の繊維の束を備えており、そこでは、繊維を、一端または両端においてアンカー等に固定することができる。本装置は、同様に可撓性ワイヤと係合する支持構造および/または作動器具をさらに備えることができる。支持構造は作動器具として機能しても機能しなくてもよい。可撓性ワイヤと係合する構成要素は、可撓性ワイヤの上を摺動することができ、または可撓性ワイヤに固定して接続される。ガイドカテーテル、マイクロカテーテルおよび/または吸引カテーテル等、1つまたは複数のカテーテルを用いて、処置を容易にすることができるが、ガイドカテーテルを、吸引カテーテルとして構成することも可能である。本技術分野において既知である要素等、装置、イントロデューサ、止血弁等の近位端を、患者の血管内への要素の導入を可能にするように配置することができ、ルアーロック取付具等のさまざまな取付具を、患者の外部の様々な構成要素を患者の血管内に誘導することによって、それらの構成要素を送達するために使用することができる。
血塊除去の処置は、概して、繊維ベースの血塊係合要素を血管内で血塊を通り越して送達すること、血塊を近位方向に引っ張ることと、血管から血塊を吸引することとを含む。プロセスは、血塊除去を容易にするために血塊を解体することをさらに含むことができる。血塊係合装置は、概して、先のセクションで説明した構造のうちのいずれをも含むことができる。処置は、血塊の除去中に塞栓として血塊の断片のいかなる放出も低減または排除するように設計されている。血塊の除去に続き、繊維ベースの装置は、場合によっては断片の除去を制限または防止する連続した吸引によって回収される。
可撓性ワイヤおよび血塊係合器具の繊維ベースの要素は、概して滅菌パッケージに合わせて包装される。好適な滅菌処置は本技術分野において既知であり、他の処置も開発され得る。システム全体のさらなる構成要素を合わせて包装してもしなくてもよい。たとえば、ガイドカテーテルの設計に応じて、別個に包装することができる従来の構成要素を用いてもよい。同様の問題は、システム全体の他の構成要素に関連する。概して、本システムで用いられる固有の構成要素を、便宜上合わせて包装することができる。
Claims (10)
- 急性脳卒中事象をもたらす大脳動脈からの血塊を除去するための医療デバイスシステムであって、
送達ワイヤ上に取り付けられた繊維ベースの血塊係合デバイスであって、前記血塊の遠位側にある前記大脳動脈の内部に位置決めするように構成され、前記大脳動脈の内周に沿うように、前記繊維の少なくとも一部が、前記送達ワイヤに対して外方へ延在する状態の展開して延びた形態を有する繊維ベースの血塊係合デバイスと、
吸引カテーテルであって、該吸引カテーテルは、中央内腔を有し、前記繊維ベースの血塊係合デバイスが前記血塊との係合のために近位方向に移動できるように、前記吸引カテーテルが前記血塊の近位位置にある状態で前記血塊の遠位位置に前記繊維ベースの血塊係合デバイスを位置決めするために前記吸引カテーテルの前記中央内腔を通じて前記送達ワイヤ上で前記繊維ベースの血塊係合デバイスを送達するように構成され、前記血塊を前記吸引カテーテルに引き入れる一方で、前記吸引カテーテルを通じた吸引が、展開した前記繊維ベースの血塊係合デバイスによって提供される保護とともに行われるように、前記繊維ベースの血塊係合デバイスの前記繊維が、動脈の変化する内周に沿ったままであり、それにより、前記血塊を前記吸引カテーテルに引き寄せるプロセスの間に前記血塊と係合したままであるように構成されている吸引カテーテルとを備える、医療デバイスシステム。 - 作動器具をさらに備え、当該作動器具が、前記繊維ベースの血塊係合デバイスを前記展開して延びた形態に移行するように構成されている、請求項1に記載の医療デバイスシステム。
- 前記作動器具がマイクロカテーテルである、請求項2に記載の医療デバイスシステム。
- 前記繊維ベースの血塊係合デバイスが、複数の不織繊維束を備えている、請求項1に記載の医療デバイスシステム。
- 可撓性の前記送達ワイヤに取り付けられるか又は可撓性の前記送達ワイヤで送達される補助的係合構造をさらに備える、請求項1に記載の医療デバイスシステム。
- 前記展開した形態にある前記繊維が、前記繊維が織られていないままである一方で、3次元濾過マトリックス内でサイズが分散している有効な孔を備えた3次元濾過マトリックスを形成する、請求項1に記載の医療デバイスシステム。
- 前記繊維ベースの血塊係合デバイスが、放射線不透過性バンドを備えるか、又は、前記繊維ベースの血塊係合デバイスの前記繊維が、放射線不透過性繊維を備える、請求項1に記載の医療デバイスシステム。
- 中央ガイドカテーテル内腔を備えるガイドカテーテルをさらに備え、前記吸引カテーテルが、前記中央ガイドカテーテル内腔を通じて導入されるように構成されている、請求項1に記載の医療デバイスシステム。
- 前記送達ワイヤに取り付けられず且つ前記送達ワイヤで送達されるように構成された機械的治療デバイスをさらに備える、請求項1に記載の医療デバイスシステム。
- 前記機械的治療デバイスが、バルーン、ステント送達デバイス又はアテローム切除デバイスである、請求項1に記載の医療デバイスシステム。
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EP2558005B1 (en) | 2022-03-30 |
US8814892B2 (en) | 2014-08-26 |
EP2558005A4 (en) | 2017-08-09 |
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JP5808792B2 (ja) | 2015-11-10 |
EP4039203A1 (en) | 2022-08-10 |
JP2013523404A (ja) | 2013-06-17 |
EP2558005A2 (en) | 2013-02-20 |
WO2011130256A3 (en) | 2012-03-08 |
US20140371782A1 (en) | 2014-12-18 |
US20170164964A1 (en) | 2017-06-15 |
JP6143272B2 (ja) | 2017-06-07 |
WO2011130256A2 (en) | 2011-10-20 |
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